Pool with 512b and 4k sector drives

[phatfish]

So i read this:

By default, FreeNAS will treat all disks as 4K sector (“Advanced Format”)
disks. This is a future-proof setting that allows AF disks to later
be used as replacement drives for older, legacy 512 byte sector drives
without compromising performance. The administrator can optionally disable
this 4K-by-default behavior by setting vfs.zfs.vdev.larger_ashift_minimal
to 0 in both sysctl and loader tunables.​

http://www.freenas.org/blog/freenas-9-2-0-release/

An older release but im curious if that still stands? As when i check 9.10 i get the bellow:

Code:

sysctl -a | grep vfs.zfs.vdev.larger
vfs.zfs.vdev.larger_ashift_minimal: 0

It appears to be turned off. Would i benefit from it being on as i have a pool with both 512b and 4k sector sizes? I intend to replace the older drives eventually so they will all be 4k.

Thanks

 

[mav@]

That tunable is set to 1 only during pool creation or new disks addition. FreeNAS ZFS pools created through the WebUI should always be 4K aligned now.

 

[phatfish]

Ah OK. I guess there is a command I can run to get that info from the pool it's self, ill have a search, thanks.